North Korean hackers may have stolen secret US-South Korean war plans to kill Kim Jong Un

South Korean (blue headbands) and U.S. Marines in a joint drill in 2016.

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REUTERS/Kim Hong-Ji

South Korean lawmaker Lee Cheol-hee said that North Korean hackers have stolen classified military documents, including the US and South Korea’s most current war plans and plans to kill Kim Jong Un, the Financial Times reports.

Lee said that defense officials revealed to him that 235 gigabytes of data had been stolen, 80% of which has yet to be identified.

But Lee said the theft included Operational Plan 5015, the US and South Korea’s current plan for war with North Korea.

The news follows a May announcement from South Korea’s defense ministry saying its military network had been breached.

“This is a total failure of management and monitoring [of classified information],” Shin Jong-woo, a researcher at the Korea Defense and Security Forum told the Financial Times of the hacks.